DummyDestination.php

<?php

namespace Drupal\migrate_events_test\Plugin\migrate\destination;

use Drupal\migrate\Plugin\migrate\destination\DestinationBase;
use Drupal\migrate\Row;

/**
 * @MigrateDestination(
 *   id = "dummy",
 *   requirements_met = true
 * )
 */
class DummyDestination extends DestinationBase {
    
    /**
     * {@inheritdoc}
     */
    public function getIds() {
        $ids['value']['type'] = 'string';
        return $ids;
    }
    
    /**
     * {@inheritdoc}
     */
    public function fields() {
        return [
            'value' => 'Dummy value',
        ];
    }
    
    /**
     * {@inheritdoc}
     */
    public function import(Row $row, array $old_destination_id_values = []) {
        return [
            'value' => $row->getDestinationProperty('value'),
        ];
    }

}